8644338405677 has 16 divisors (see below), whose sum is σ = 9561092338560. Its totient is φ = 7763565724992.

The previous prime is 8644338405643. The next prime is 8644338405683. The reversal of 8644338405677 is 7765048334468.

It is a cyclic number.

It is not a de Polignac number, because 8644338405677 - 2²⁰ = 8644337357101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8644338405377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26409224 + ... + 26734542.

It is an arithmetic number, because the mean of its divisors is an integer number (597568271160).

Almost surely, 2^{8644338405677} is an apocalyptic number.

It is an amenable number.

8644338405677 is a deficient number, since it is larger than the sum of its proper divisors (916753932883).

8644338405677 is a wasteful number, since it uses less digits than its factorization.

8644338405677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380612.

The product of its (nonzero) digits is 325140480, while the sum is 65.

The spelling of 8644338405677 in words is "eight trillion, six hundred forty-four billion, three hundred thirty-eight million, four hundred five thousand, six hundred seventy-seven".